which one will you use for daily transactions. stablecoins issued by your country's central bank, or mainstream crypto coins like bitcoin.
Stable coin and bitcoin have different purpose and im sure that people will be using both of coins in their daily life. People are using bitcoin to trade and they will be taking profit through stable coin which can keep their profit will not be affected by the volatility.
or privately released stablecoins such as tether. or keep using cash because you are used to it. and give the reason why you chose that coin.
That depends on the various things. Remember that when you're using tether based on the scalable network, the transaction fees will be so cheap. It can be said that if people will always still use tether instead of cash caused by thether adopted globally by various exchange site but your question was so weird.